KEY FEATURES: Introduces students to developing research questions and shows their importance in driving research design. Rarely taught topics, such as how to enter and clean data, offer students information missed in both research methods and statistics courses. Shows how to write up survey results for academic, business and nonprofit reports to alleviate the confusion students feel about how to write up findings. Rigorous treatment of sampling focuses on many sampling issues from probability theory to weighting. Offers the process of actually conducting a survey with advice on administering surveys, incentives, and improving response rates.

How Is a Cluster Sample Collected?

Erin Ruel

Cluster sampling is useful when our population cannot be listed on a sampling frame, but is clustered or organized under some grouping that can be listed on a sampling frame. For example, third graders cannot be listed on a sampling frame, but elementary schools can. We can use elementary schools as clusters of third graders.

Let’s say we are interested in the math development of third graders. We can randomly select a probability sample of schools. We do not yet have our sample of third graders, however. Once we have the schools, we can request a listing of all third-grade students in each school. One option would be to take all third graders in each selected school. If ...

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